Bad layout
lazarus / 67-Windows

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LemonParty · 2025-06-26 13:10

I have a small windowed app. On the form of this app present TPanel,
TImage and TLabel. In Windows 10 this app looks fine. In Windows 11
elements are not on their places and have smaller size. Is MS break
something?

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alpine · 2025-06-26 13:15

Is it the screen in the same DPI?

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LemonParty · 2025-06-26 13:23

No.

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alpine · 2025-06-26 13:28

Then look at https://wiki.freepascal.org/High_DPI

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LemonParty · 2025-06-26 13:47

I found this
QuoteIf you create controls run-time, scale all coordinates, sizes etc
that have to be DPI-aware with TControl.Scale96ToForm() or
ScaleDesignToForm() (depending on your choice of default PPI) or
prepare your container (e.g. panel with controls) as it was with 96
PPI and then call TControl.AutoAdjustLayout(lapAutoAdjustForDPI, 96,
ParentFormOfTheContainer.PixelsPerInch, 0, 0);I create controls in
runtime and have high DPI. What method should I call? (DPI awareness
is set to "on")

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alpine · 2025-06-26 14:15

Quote from: LemonParty on June 26, 2025, 03:47:40 pmI found this
QuoteIf you create controls run-time, scale all coordinates, sizes etc
that have to be DPI-aware with TControl.Scale96ToForm() or
ScaleDesignToForm() (depending on your choice of default PPI) or
prepare your container (e.g. panel with controls) as it was with 96
PPI and then call TControl.AutoAdjustLayout(lapAutoAdjustForDPI, 96,
ParentFormOfTheContainer.PixelsPerInch, 0, 0);I create controls in
runtime and have high DPI. What method should I call? (DPI awareness
is set to "on")
I'm not quite sure but I would suggest to make use of anchoring and
child-sizing mechanisms instead of trying to recalculate fixed
positions.
https://wiki.freepascal.org/LCL_AutoSizing
https://wiki.freepascal.org/Anchor_Sides

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wp · 2025-06-26 17:37

Just made myself a VM with Windows 10 as guest in my standard Windows
11. And I don't see any layout issue for a project migrating between
both systems, even with non-anchored and non-autosized controls, and
independent of monitor resolution.

You say that "dpi awareness" is "on". But is LCL scaling on as well?
(it should be by default).

Note that these two settings are relevant for pixel density changes
(ppi). But there is another setting in Windows which allows to change
text size only, under Settings > Accessibility settings. The case when
TextSize here is different from 100% is not handled by LCL scaling,
only the text becomes larger and, if controls are not anchored and
autosized, they tend to overlap their neighbors - see attached
screenshots comparing 100% and 150% text size settings. Do not use
this setting to increase text size, use only the setting in System >
Screen > Scaling

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LemonParty · 2025-06-27 12:06

Thank you, alpine.

QuoteBut there is another setting in Windows which allows to change
text size only, under Settings > Accessibility settings.Yes, I used
this setting. Seems that what case the problem.